CD74ACT574EG4 Equivalent & Substitute Parts

Part Overview

The CD74ACT574EG4 is a D-Type flip-flop logic integrated circuit featuring 1 element with 8-bit capacity per element, designed for positive edge triggering applications. This component operates at a maximum clock frequency of 110 MHz with tri-state, non-inverted outputs, housed in a 20-DIP (0.300", 7.62mm) through-hole package.

The CD74ACT574EG4 is discontinued at DiGi Electronics. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production, repair, and legacy system support.

Substiute Parts

CD74ACT574EG4

Texas InstrumentsIn Stock: 1161CD74ACT574EG4 Datasheet

Current PartRFQ

CD74ACT574E

Harris CorporationIn Stock: 2372CD74ACT574E Datasheet

MFR RecommendedRFQ

CD74ACT374E

Harris CorporationIn Stock: 1825CD74ACT374E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74ACT574EG4 are identified based on strict electrical and mechanical parameter matching within the 74ACT logic family. The substitution criteria are:

Critical Parameters for Substitution:

• Type: D-Type Flip-Flop
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: Tri-State, Non-Inverted
• Clock Frequency: 110 MHz
• Max Propagation Delay: 11.2 ns @ 5V, 50pF
• Trigger Type: Positive Edge
• Current - Output High/Low: 24 mA / 24 mA
• Voltage - Supply: 4.5V ~ 5.5V
• Current - Quiescent (Iq): 8 µA
• Input Capacitance: 10 pF
• Operating Temperature: -55°C ~ 125°C (TA)
• Package / Case: 20-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

The identified substitute parts maintain full electrical and mechanical compatibility with the original CD74ACT574EG4 specification.

Parameter Comparison

Engineering Selection Recommendations

CD74ACT574E (MFR Recommended Substitute): This part is the manufacturer-recommended equivalent for the CD74ACT574EG4. It maintains identical electrical specifications and physical packaging. The primary distinction is product status classification (Obsolete versus Discontinued at DiGi Electronics) and RoHS compliance status. The CD74ACT574E is suitable for applications where RoHS3 compliance is not a requirement.

CD74ACT374E (Parametric Equivalent): This part provides parametric equivalence to the CD74ACT574EG4, matching all critical electrical and mechanical parameters. Like the CD74ACT574E, it is classified as Obsolete and does not meet RoHS3 compliance. The CD74ACT374E is suitable for applications where parametric compatibility is the primary selection criterion and RoHS compliance is not mandated.

Compliance Considerations: The CD74ACT574EG4 is ROHS3 compliant. Both substitute parts (CD74ACT574E and CD74ACT374E) are RoHS non-compliant. Design teams requiring RoHS3 compliance must evaluate alternative component families or confirm that RoHS exemptions apply to their application.

Frequently Asked Questions (FAQ)

Q: Can CD74ACT574E be used as a direct replacement for CD74ACT574EG4?

A: Yes. The CD74ACT574E is the manufacturer-recommended substitute and maintains identical electrical specifications, propagation delay, output drive capability, and physical packaging (20-DIP through-hole). Both parts operate within the same voltage supply range (4.5V ~ 5.5V) and temperature range (-55°C ~ 125°C). The primary difference is RoHS compliance status.

Q: What is the difference between CD74ACT574E and CD74ACT374E?

A: Both parts are parametrically equivalent to the CD74ACT574EG4 and share identical electrical specifications. The distinction lies in the base product number designation (74ACT574 versus 74ACT374). Both are suitable for applications requiring D-Type flip-flop functionality with 8-bit capacity, positive edge triggering, and tri-state outputs.

Q: Are there any package compatibility issues when substituting these parts?

A: No. All three parts use the same 20-DIP (0.300", 7.62mm) through-hole package with identical pin configurations. They are mechanically and electrically interchangeable at the board level.

Q: What should be considered regarding RoHS compliance when selecting a substitute?

A: The CD74ACT574EG4 is ROHS3 compliant, while both substitute parts (CD74ACT574E and CD74ACT374E) are RoHS non-compliant. If your application or regulatory requirements mandate RoHS compliance, alternative component families must be evaluated. If RoHS exemptions apply to your specific application, either substitute part is electrically suitable.

Q: Are these parts suitable for new designs?

A: All three parts are classified as either Discontinued or Obsolete. For new designs, evaluation of current-production alternatives within the 74ACT logic family or modern logic families is recommended. These parts are suitable for legacy system maintenance, repair, and production of existing designs where component continuity is required.

Q: What is the maximum clock frequency for these parts?

A: All three parts support a maximum clock frequency of 110 MHz with a maximum propagation delay of 11.2 ns at 5V with a 50 pF load.